1.7.Set Up:Apply the equalities of and Solve: (a)(b)1.8.Set Up:We know:and Solve: (a)(b)(c)Express and compare the English wrench sizes as decimal values:andThe wrench is closest to 12 mm.1.9.Set Up:We apply the equalities of and Solve:Reflect:Note how the unit conversion strategy, of cancellation of units, automatically tells us whether to multiply ordivide by the conversion factor.1.10.Set Up:Apply the given conversion factors,along withSolve:1.11.Set Up:We know:and Solve:Currently, in 2005, gasoline in the U.S. costs about $2 per gallon so the price in Europe is about three times higher.1.12.Set Up:From Appendix A, the volume Vof a sphere is given in terms of its radius as while itssurface area Ais given as Also, by definition, the radius is one-half the diameter or Finally, the necessary equalities for this problem are:and Solve:and1.13.Set Up:We apply the basic time relations of 1 and in part (a) and use the result of (a) in part (b). Similarly, apply the result of part (b) in solving part (c).

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